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#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-or-later
# SPDX-FileCopyrightText: 2014-2016,2020,2021,2023,2024 Leah Rowe <leah@libreboot.org>
# SPDX-FileCopyrightText: 2021,2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022-2023 Alper Nebi Yasak <alpernebiyasak@gmail.com>
# SPDX-FileCopyrightText: 2023 Riku Viitanen <riku.viitanen@protonmail.com>

set -u -e

. "include/err.sh"
. "include/option.sh"

seavgabiosrom="elf/seabios/default/libgfxinit/vgabios.bin"
grub_background="background1280x800.png"
grubelf="elf/grub/grub.elf"
cfgsdir="config/coreboot"

# Disable all payloads by default.
# target.cfg files have to specifically enable [a] payload(s)
pv="payload_grub payload_grub_withseabios payload_seabios payload_memtest t"
pv="${pv} payload_seabios_withgrub payload_seabios_grubonly payload_uboot memtest_bin"
v="romdir cbrom initmode displaymode cbcfg targetdir tree keymaps release"
v="${v} grub_timeout ubdir board grub_scan_disk uboot_config status"
eval "$(setvars "n" ${pv})"
eval "$(setvars "" ${v} boards _displaymode _payload _keyboard all targets \
    skipped listboards list_type)"

main()
{
	check_project

	while [ $# -gt 0 ]; do

		if [ "$listboards" = "y" ]; then
			[ "$1" = "stable" ] || [ "$1" = "unstable" ] || \
			    [ "$1" = "broken" ] || [ "$1" = "untested" ] || \
			    [ "$1" = "unknown" ] || \
				$err "invalid list type '$1'"
			list_type="$list_type $1"
			list_type="${list_type# }"
			shift 1; continue
		fi

		case ${1} in
		help)
			usage
			exit 0 ;;
		list)
			boards=$(items config/coreboot) || \
			    $err "Cannot generate list of boards for list"
			listboards="y"
			shift 1; continue ;;
		-d) _displaymode="${2}" ;;
		-p) _payload="${2}" ;;
		-k) _keyboard="${2}" ;;
		*)
			[ "${1}" = "all" ] && all="y"
			boards="${1} ${boards}"
			shift && continue ;;
		esac
		shift 2
	done

	[ "$listboards" = "y" ] && [ -z "$list_type" ] && \
		list_type="stable unstable broken untested unknown"

	[ "${all}" != "y" ] || boards=$(items config/coreboot) || \
	    $err "Cannot generate list of boards for building"

	for x in ${boards}; do
		eval "$(setvars "n" ${pv}) $(setvars "" ${v})"
		grub_background="background1280x800.png"
		board="${x}"

		configure_target
		[ "$board" = "$tree" ] && \
			continue

		handle_status

		if [ "$listboards" = "y" ]; then
			for _list_type in $list_type; do
				[ "$status" != "$_list_type" ] && continue
				printf "%s\n" "$board"
			done
			continue
		fi

		# exclude certain targets from the release
		skip_board && \
		    printf "Skip target %s(%s)\n" "$board" "$status" && \
		    skipped="* $board($status)\n$skipped" && continue

		build_payloads
		build_target_mainboard

		[ -d "bin/${board}" ] || continue
		targets="* bin/${board}\n${targets}"
	done

	[ "$listboards" = "y" ] && return 0

	if [ -n "$skipped" ]; then	
		printf "\nThese targets were skipped:\n"
		eval "printf \"${skipped}\""
		printf "^^ These targets were skipped.\n\n"
	fi

	[ -z "${targets}" ] && $err "No ROM images were compiled"
	printf "\nROM images available in these directories:\n"
	eval "printf \"${targets}\""
	printf "^^ ROM images available in these directories.\n\n"

	printf "DO NOT flash images from elf/ - please use bin/ instead.\n"
}

configure_target()
{
	targetdir="${cfgsdir}/${board}"
	[ -f "${targetdir}/target.cfg" ] || \
		$err "Missing target.cfg for target: ${board}"

	# Override the above defaults using target.cfg
	. "${targetdir}/target.cfg"

	[ -z "${grub_scan_disk}" ] && grub_scan_disk="both"
	[ "$grub_scan_disk" != "both" ] && [ "$grub_scan_disk" != "ata" ] \
	    && [ "${grub_scan_disk}" != "ahci" ] && \
		grub_scan_disk="both"

	[ -z "$tree" ] && $err "$board: tree not defined"

	[ "${payload_memtest}" != "y" ] && payload_memtest="n"
	[ "${payload_grub_withseabios}" = "y" ] && payload_grub="y"
	[ "${payload_grub_withseabios}" = "y" ] && \
		eval "$(setvars "y" payload_seabios payload_seabios_withgrub)"
	[ "$payload_seabios_withgrub" = "y" ] && payload_seabios="y"
	[ "$payload_seabios_grubonly" = "y" ] && payload_seabios="y"
	[ "$payload_seabios_grubonly" = "y" ] && payload_seabios_withgrub="y"

	# The reverse logic must not be applied. If SeaBIOS-with-GRUB works,
	# that doesn't mean GRUB-withSeaBIOS will. For example, the board
	# might have a graphics card whose vga rom coreboot doesn't execute
	[ "$payload_grub" != "y" ] && [ "$payload_seabios" != "y" ] && \
	    [ "${payload_uboot}" != "y" ] && \
		for configfile in "${targetdir}/config/"*; do
			[ -e "${configfile}" ] || continue
			$err "target '${board}' defines no payload"
		done

	[ "$payload_uboot" != "n" ] && [ "$payload_uboot" != "y" ] && \
		payload_uboot="n"
	[ "$payload_uboot" = "y" ] && [ -z "$uboot_config" ] && \
		uboot_config="default"

	# Override all payload directives with cmdline args
	[ -z "${_payload}" ] && return 0
	printf "setting payload to: %s\n" "${_payload}"
	eval "$(setvars "n" payload_grub payload_memtest payload_seabios \
	    payload_seabios_withgrub payload_uboot payload_grub_withseabios \
	    payload_seabios_grubonly)"
	eval "payload_${_payload}=y"
}

handle_status()
{
	[ "$status" = "stable" ] || [ "$status" = "unstable" ] || \
	    [ "$status" = "broken" ] || [ "$status" = "untested" ] || \
		status="unknown"

	[ "$listboards" != "y" ] && \
		printf "Handling target: %s (status=%s)\n" "$board" "$status"

	[ "$status" = "broken" ] && release="n"
	[ "$status" = "unknown" ] && release="n"
	[ "$status" = "untested" ] && release="n"

	[ "$listboards" != "y" ] && \
	    [ "$status" != "stable" ] && [ "$status" != "$release_type" ] && \
		printf "WARNING: %s not marked stable (status=%s):\n\n" \
		    "$board" "$status"; return 0
}

skip_board()
{
	[ "$release" = "n" ] && [ "$lbmk_release" = "y" ] && \
		return 0
	[ -n "$release_type" ] && [ "$status" = "$release_type" ] && \
		return 1

	if [ "$lbmk_release" != "y" ] && [ "$status" != "stable" ] && \
	    [ "$status" != "$release_type" ]; then
		if [ -f "$targetdir/warn.txt" ]; then
			printf "Regarding board '%s' (status '%s'):\n" \
			    "$board" "$status"
			cat -u "$targetdir/warn.txt" || \
			    $err "!cat $targetdir/warn.txt"
		fi
		while true; do
			printf "Board %s has status '%s'. Skip? [y/n]" \
			    "$board" "$status"
			read -r skip
			[ "$skip" = "y" ] && return 0
			[ "$skip" = "n" ] && return 1; continue
		done
	fi; return 1
}

build_payloads()
{
	romdir="bin/${board}"
	cbdir="src/coreboot/${board}"
	[ "${board}" = "${tree}" ] || cbdir="src/coreboot/${tree}"
	cbfstool="cbutils/${tree}/cbfstool"
	cbrom="${cbdir}/build/coreboot.rom"

	[ -f "$cbfstool" ] || x_ ./update trees -b coreboot utils $tree

	memtest_bin="memtest86plus/build64/memtest.bin"
	[ "${payload_memtest}" != "y" ] || [ -f "src/${memtest_bin}" ] || \
		x_ ./update trees -b memtest86plus

	[ "$payload_seabios" = "y" ] && x_ ./update trees -b seabios
	if [ "$payload_grub" = "y" ] || [ "$payload_seabios_withgrub" = "y" ] \
	    || [ "$payload_seabios_grubonly" = "y" ]; then build_grub_payload
	fi
	[ "${payload_uboot}" = "y" ] && build_uboot_payload; return 0
}

build_grub_payload()
{
	x_ mkdir -p elf/grub

	for keymapfile in config/grub/keymap/*.gkb; do
		[ -f "${keymapfile}" ] || continue

		keymaps="${keymaps} ${keymapfile}"
	done
	[ -z "$_keyboard" ] || [ -f "$grubcfgsdir/keymap/$_keyboard.gkb" ] || \
		$err "build_grub_payload: $_keyboard layout not defined"
	[ -n "$_keyboard" ] && keymaps="${grubcfgsdir}/keymap/${_keyboard}.gkb"
	[ -f "$grubelf" ] && return 0
	[ -f "src/grub/grub-mkstandalone" ] || x_ ./update trees -b grub

	./src/grub/grub-mkstandalone \
	    --grub-mkimage="src/grub/grub-mkimage" \
	    -O i386-coreboot \
	    -o "elf/grub/grub.elf" \
	    -d "src/grub/grub-core/" \
	    --fonts= --themes= --locales=  \
	    --modules="${grub_modules}" \
	    --install-modules="${grub_install_modules}" \
	    "/boot/grub/grub.cfg=${grubcfgsdir}/config/grub_memdisk.cfg" \
	    "/boot/grub/grub_default.cfg=${grubcfgsdir}/config/grub.cfg" || \
	    $err "could not generate grub.elf"
}

build_uboot_payload()
{
	x_ ./update trees -b u-boot ${board}
	ubdir="elf/u-boot/${board}/${uboot_config}"
	ubootelf="${ubdir}/u-boot.elf"
	[ ! -f "${ubootelf}" ] && [ -f "${ubdir}/u-boot" ] && \
		ubootelf="${ubdir}/u-boot"
	[ -f "${ubootelf}" ] && return 0
	$err "Can't find u-boot build for board, $board";
}

build_target_mainboard()
{
	rm -f "${romdir}/"* || $err "!prepare, rm files, ${romdir}"

	for x in "normal" "vgarom" "libgfxinit"; do
		initmode="${x}"
		hmode="vesafb"
		[ "${initmode}" = "vgarom" ] || hmode="corebootfb"
		modes="${hmode} txtmode"
		[ -z "${_displaymode}" ] || modes="${_displaymode}"
		for y in ${modes}; do
			displaymode="${y}"
			[ "${initmode}" = "normal" ] && \
			    [ "$displaymode" != "txtmode" ] && continue
			cbcfg="${targetdir}/config/${initmode}_${displaymode}"
			[ "${initmode}" = "normal" ] && cbcfg="${cbcfg%_*}"
			build_roms "${cbcfg}"
			x_ rm -f "$cbrom"
		done
	done
}

# Main ROM building function. This calls all other functions below
build_roms()
{
	cbcfg="${1}"
	if [ ! -f "${cbcfg}" ]; then
		printf "'%s' does not exist. Skipping build for %s %s %s\n" \
		    "$cbcfg" "$board" "$displaymode" "$initmode" 1>&2
		return 0
	fi

	x_ ./update trees -b coreboot ${board}

	_cbrom="elf/coreboot_nopayload_DO_NOT_FLASH"
	_cbrom="${_cbrom}/${board}/${initmode}_${displaymode}"
	[ "${initmode}" = "normal" ] && \
		_cbrom="${_cbrom%"_${displaymode}"}"
	_cbrom="${_cbrom}/coreboot.rom"
	cbrom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
	x_ cp "${_cbrom}" "${cbrom}"

	[ "${payload_memtest}" != "y" ] || \
		x_ "${cbfstool}" "${cbrom}" add-payload \
		    -f "src/${memtest_bin}" -n img/memtest -c lzma
	[ "${payload_seabios}" = "y" ] && build_seabios_roms
	[ "$payload_grub" != "y" ] || x_ build_grub_roms "$cbrom" "grub"
	[ "${payload_uboot}" = "y" ] || return 0
	x_ cp "${_cbrom}" "${cbrom}"
	build_uboot_roms
}

build_seabios_roms()
{
	if [ "${payload_seabios_withgrub}" = "y" ]; then
		t=$(mktemp -t coreboot_rom.XXXXXXXXXX)
		x_ cp "${cbrom}" "${t}"
		x_ build_grub_roms "${t}" "seabios_withgrub"
	else
		t=$(mkSeabiosRom "${cbrom}" "fallback/payload") || \
		    $err "build_seabios_roms: cannot build tmprom"
		newrom="${romdir}/seabios_${board}_${initmode}_${displaymode}"
		[ "${initmode}" = "normal" ] && newrom="${romdir}/seabios" \
			&& newrom="${newrom}_${board}_${initmode}"
		x_ moverom "${t}" "${newrom}.rom"
	fi
	x_ rm -f "${t}"
}

# Make separate ROM images with GRUB payload, for each supported keymap
build_grub_roms()
{
	tmprom="${1}"
	payload1="${2}" # allow values: grub, seabios, seabios_withgrub

	grub_cbfs="fallback/payload"
	if [ "$payload1" = "grub" ] && [ "$payload_grub_withseabios" = "y" ]
	then
		_tmpmvrom=$(mkSeabiosRom "$tmprom" "seabios.elf") || \
		    $err "build_grub_roms 1 $board: can't build tmprom"
		x_ mv "$_tmpmvrom" "$tmprom"
	elif [ "$payload1" != "grub" ] && [ "$payload_seabios_withgrub" = "y" ]
	then
		grub_cbfs="img/grub2"
		_tmpmvrom=$(mkSeabiosRom "$tmprom" fallback/payload) || \
		    $err "build_grub_roms 2 $board: can't build tmprom"
		x_ mv "$_tmpmvrom" "$tmprom"
	fi

	# we only need insert grub.elf once, for each coreboot config:
	x_ "${cbfstool}" "${tmprom}" add-payload -f "${grubelf}" \
	    -n ${grub_cbfs} -c lzma

	# we only need insert background.png once, for each coreboot config:
	if [ "${displaymode}" = "vesafb" ] || \
	    [ "${displaymode}" = "corebootfb" ]; then
		backgroundfile="config/grub/background/${grub_background}"
		"${cbfstool}" "${tmprom}" add -f ${backgroundfile} \
		    -n background.png -t raw || \
		    $err "insert background, ${backgroundfile}"
	fi

	tmpcfg=$(mktemp -t coreboot_rom.XXXXXXXXXX)
	printf "set grub_scan_disk=\"%s\"\n" "$grub_scan_disk" >"$tmpcfg" \
	    || $err "set grub_scandisk, $grub_scan_disk, $tmpcfg"
	[ "${grub_scan_disk}" = "both" ] || \
	    x_ "$cbfstool" "$tmprom" add -f "$tmpcfg" -n scan.cfg -t raw
	printf "set timeout=%s\n" "${grub_timeout}" > "${tmpcfg}" || \
	    $err "set timeout, ${grub_timeout}, ${tmpcfg}"
	[ -z "${grub_timeout}" ] || x_ "${cbfstool}" "${tmprom}" add \
	    -f "${tmpcfg}" -n timeout.cfg -t raw
	x_ rm -f "${tmpcfg}"

	for keymapfile in ${keymaps}; do
		[ -f "${keymapfile}" ] || continue
		keymap="${keymapfile##*/}"
		keymap="${keymap%.gkb}"

		tmpgrubrom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
		x_ cp "${tmprom}" "${tmpgrubrom}"
		x_ "$cbfstool" "$tmpgrubrom" add -f "$keymapfile" \
		    -n keymap.gkb -t raw

		newrom="${romdir}/${payload1}_${board}_${initmode}_"
		newrom="${newrom}${displaymode}_${keymap}.rom"
		[ "${initmode}" = "normal" ] && \
			newrom="${romdir}/${payload1}_${board}_" && \
			newrom="${newrom}${initmode}_${keymap}.rom"
		x_ moverom "${tmpgrubrom}" "${newrom}"
		[ "${payload_seabios_grubonly}" = "y" ] && \
			mkSeabiosGrubonlyRom "${tmpgrubrom}" "${newrom}"
		x_ rm -f "${tmpgrubrom}"
	done
}

# make a rom in /tmp/ and then print the path of that ROM
mkSeabiosRom() {
	_cbrom="${1}" # rom to insert seabios in. will not be touched
		# (a tmpfile will be made instead)
	_seabios_cbfs_path="${2}" # e.g. fallback/payload
	_seabioself="elf/seabios/default/${initmode}/bios.bin.elf"
	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)

	x_ cp "${_cbrom}" "${tmprom}"
	x_ "$cbfstool" "$tmprom" add-payload -f "$_seabioself" \
	    -n "${_seabios_cbfs_path}" -c lzma
	x_ "$cbfstool" "$tmprom" add-int -i 3000 -n etc/ps2-keyboard-spinup

	z="2"; [ "$initmode" = "vgarom" ] && z="0"
	x_ "$cbfstool" "$tmprom" add-int -i $z -n etc/pci-optionrom-exec
	x_ "$cbfstool" "$tmprom" add-int -i 0 -n etc/optionroms-checksum
	[ "$initmode" != "libgfxinit" ] || \
		x_ "$cbfstool" "$tmprom" add -f "$seavgabiosrom" \
		    -n vgaroms/seavgabios.bin -t raw

	printf "%s\n" "${tmprom}"
}

# SeaGRUB configuration
mkSeabiosGrubonlyRom()
{
	_grubrom="${1}"
	_newrom="${2}"

	tmpbootorder=$(mktemp -t coreboot_rom.XXXXXXXXXX)

	# only load grub, by inserting a custom bootorder file
	printf "/rom@img/grub2\n" > "$tmpbootorder" || $err "printf bootorder"
	x_ "${cbfstool}" "${_grubrom}" \
	    add -f "${tmpbootorder}" -n bootorder -t raw
	x_ rm -f "${tmpbootorder}"

	x_ "${cbfstool}" "${_grubrom}" add-int -i 0 -n etc/show-boot-menu
	x_ moverom "${_grubrom}" "${_newrom%.rom}_grubonly.rom"
}

build_uboot_roms()
{
	tmprom=$(mkUbootRom "${cbrom}" "fallback/payload") || \
	    $err "build_uboot_roms $board: could not create tmprom"
	newrom="${romdir}/uboot_payload_${board}_${initmode}_${displaymode}.rom"
	x_ moverom "${tmprom}" "${newrom}"
	x_ rm -f "${tmprom}"
}

# make a rom in /tmp/ and then print the path of that ROM
mkUbootRom() {
	_cbrom="${1}"
	_uboot_cbfs_path="${2}"

	_ubdir="elf/u-boot/${board}/${uboot_config}"
	_ubootelf="${_ubdir}/u-boot.elf"
	[ -f "${_ubootelf}" ] || _ubootelf="${_ubdir}/u-boot"
	[ -f "$_ubootelf" ] || $err "mkUbootRom: $board: cant find u-boot"

	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)

	x_ cp "${_cbrom}" "${tmprom}"
	x_ "$cbfstool" "$tmprom" add-payload -f "$_ubootelf" \
	    -n "${_uboot_cbfs_path}" -c lzma

	printf "%s\n" "${tmprom}"
}

moverom()
{
	printf "Creating target image: %s\n" "$2"

	x_ mkdir -p "${2%/*}"
	x_ cp "$1" "$2"
}

usage()
{
	cat <<- EOF
	USAGE:	./build roms targetname
	To build *all* boards, do this: ./build roms all
	To list *all* boards, do this: ./build roms list
	
	Optional Flags:
	-d: displaymode
	-p: payload
	-k: keyboard layout

	Example commands:

		./build roms x60
		./build roms x200_8mb x60
		./build roms x60 -p grub -d corebootfb -k usqwerty

	possible values for 'target':
	$(items "config/coreboot")

	Refer to the ${projectname} documentation for more information.
	EOF
}

main $@